STMicroelectronics ST25TV02K-AP6F3

Overview

ST25TV02K-AP6F3 from STMicroelectronics is an NFC Forum Type 5 contactless RFID tag IC compliant with ISO/IEC 15693, featuring 2-Kbit EEPROM, TruST25 digital signature, tamper detect (TD0/TD1), and dual-mode privacy protection (Kill and Untraceable modes). It operates at 13.56 MHz, supports fast read up to 53 Kbit/s, and delivers 60-year data retention with 100 k write cycles - deployed in secure product authentication, anti-counterfeiting labels, and industrial asset tagging.

For engineers reviewing the ST25TV02K-AP6F3 datasheet, ST25TV02K-AP6F3 pinout, ST25TV02K-AP6F3 application, or ST25TV02K-AP6F3 equivalent, key selection criteria include ISO/IEC 15693 RF interface compliance, tamper-detect loop implementation, encrypted password-based memory partitioning (two or three areas), and EAS capability for retail inventory control.

Technical Context

The ST25TV02K-AP6F3 implements a fully autonomous RF-powered architecture with no external power supply required. Its RF interface handles ISO/IEC 15693 modulation (100% ASK, 10% ASK), subcarrier (1 of 2, 1 of 4), and data rates (26.48 kbit/s, 53 kbit/s), including proprietary Fast Read commands. The internal tuning capacitance (23 pF / 99.7 pF) enables direct antenna matching without external capacitors.

Memory access is block-oriented (4-byte blocks), with user memory split into Area 0 (always readable, 1 block), plus configurable Area 1 and optional Area 2 - each protected by independent 32-bit encrypted passwords. System configuration registers (including UID, DSFID, AFI, and TruST25 signature) reside in a write-protected EEPROM segment secured by a separate 32-bit configuration password.

Key Specifications

Pinout & Package

ST25TV02K-AP6F3 is supplied in a 5-pin DFN package (ECOPACK2, RoHS-compliant), optimized for direct die bonding or compact PCB mounting. Antenna connections are AC0/AC1; tamper detection uses TD0/TD1; NC1 is unconnected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NFC/RFID tag applications.

Compared with NT3H2211W0FHKH and N24RF04, ST25TV02K-AP6F3 uniquely combines ISO/IEC 15693 RF autonomy, hardware tamper detection, and TruST25 signature - making it the only choice for physically unattended, high-assurance authentication in hostile environments.

Availability

ST25TV02K-AP6F3 is available at Aetrix Electronics and suitable for product authentication, industrial asset tagging, retail inventory control, and secure document tracking requiring stable component supply across extended product lifecycles.

Supply support for ST25TV02K-AP6F3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and secure connectivity solutions for industrial, automotive, and consumer markets.

ST25TV series targets secure NFC/RFID applications demanding cryptographic authenticity, physical tamper resistance, and regulatory compliance - specifically engineered for anti-counterfeiting, brand protection, and privacy-sensitive tagging.

FAQ

Does ST25TV02K-AP6F3 require an external power supply?

No. ST25TV02K-AP6F3 is fully passive and derives all operating power from the 13.56 MHz RF field generated by compatible readers or NFC smartphones. Its internal rectifier and regulator convert induced AC energy into stable DC voltage for EEPROM access and logic operation - eliminating batteries or PCB traces.

How is the TruST25 digital signature verified in practice?

The TruST25 signature is a 256-bit value stored in system configuration memory (address range 0x10–0x1F) and bound to the device's unique 64-bit UID. Verification requires reading both UID and signature via Read Configuration command, then applying ST's public-key algorithm - implemented in ST's ST25 SDK or third-party libraries like libnfc - to confirm cryptographic linkage to ST's root certificate.

Can the tamper detect feature be disabled after programming?

No. Tamper detect (TD0/TD1) is a hardware-level feature that cannot be disabled in firmware or configuration. Once the loop is broken or shorted, the device enters permanent tamper state: subsequent RF commands return error codes, and memory access is blocked - even if correct passwords are presented. This behavior is hardwired in silicon.

What happens to the 16-bit event counter during a Kill command execution?

The 16-bit event counter retains its last valid value after Kill command execution. While the device becomes permanently unresponsive to all RF commands (including Inventory), the counter contents remain intact in nonvolatile memory - accessible only via destructive decapsulation and probe analysis, preserving forensic evidence of pre-Kill activity.